Remove unused variable reWhitespace.

Author: jgm

lib/inlines.js

@@ -67,8 +67,6 @@ var reSpnl = /^ *(?:\n *)?/;
 
 var reWhitespaceChar = /^[ \t\n\x0b\x0c\x0d]/;
 
-var reWhitespace = /[ \t\n\x0b\x0c\x0d]+/g;
-
 var reUnicodeWhitespaceChar = /^\s/;
 
 var reFinalSpace = / *$/;